Extrusion



FIG. 1 is an end elevational view of an extrusion showing our new design, the opposite end being a mirror image thereof;

FIG. 2 is a bottom plan view, the top plan view being a mirror image thereof, the center being broken away to show indefinite length;

FIG. 3 is a side elevational view, the opposite side being a mirror image thereof, the center being broken away to show indefinite length; and

FIG. 4 is a perspective view thereof. 

The ornamental design for an extrusion, as shown and described. 